Effect of the addition of aliphatic diamine-functionalized carbon nanotubes on the interfacial adhesion of glass fiber/epoxy composites

Abstract

To improve the interfacial adhesion of glass fiber (GF)/epoxy composites, the GF surface was treated by dispersing aliphatic diamine-functionalized multi-walled carbon nanotubes (MWCNTs). Carboxyl MWCNTs were first modified by aliphatic diamine with different alkyl chain lengths and then deposited on the surface of GF. The effect of aliphatic diamine chain lengths on the MWCNTs’ dispersion and interfacial properties of resultant composites was investigated in detail. The results showed that uniform dispersion of MWCNTs and strong fiber/matrix interfacial adhesion could be achieved, based on the grafting of 1,8-octanediamine onto MWCNTs. Compared with the control sample, the interlaminar shear, flexural, and tensile strengths of the treated composites increased by 41%, 29%, and 30%, respectively; the interlaminar fracture toughness and storage modulus in the glass region were significantly enhanced; and the glass transition temperature increased by more than 8°C. This work demonstrates that the carbon nanotubes functionalized by appropriate chain lengths of amine modifier can improve the fiber/matrix interfacial interactions and thus enhance the strength, toughness, and stiffness of fiber-reinforced composites.

Effect of different molding pressures on the properties of glass fiber / molybdenum disulfide / Polytetrafluoroethylene composites

“…The different molding pressure before sintering affects the formation, growth and migration of bubbles in the composite, thus affecting the size of void in the composite, 47 affecting the compactness of the composite, and further affecting the synergistic effect of organic and inorganic components on the properties of the composite. The study by Fan et al 48 also showed that the interfacial adhesion between GF and PTFE plays a key role in the wear resistance of GF-filled PTFE composites. The friction coefficient and volumetric wear rate of GF/MoS 2 /PTFE composites were examined in Figure 6 in relation to various molding pressures.…”

Effect of Desert Sand on the Section Bonding Properties of Polyethylene Fiber−Engineered Cementitious Composites

“…The main reason to improve the bond between the cement matrix and the fiber is to make cement−based materials stronger [34]. Researchers have learned much about how ECC bonds at the interface [35][36][37][38]. Previous results show that ECC can improve how well concrete bonds at the joints and can be used as a long−lasting repair material for structures.…”